An air quality study near Marcellus Shale natural gas operations in Bradford, Lycoming, Sullivan and Tioga counties found no emission levels that would pose a public health concern, according to a report released today by the Department of Environmental Protection.

"The results show there are no emission levels that would be of concern to the health of residents living and working near these operations," says Mike Krancer, secretary of the DEP. "They are consistent with the results of our air monitoring in southwest and northeast Pennsylvania, the other two areas ...